Advances in biodegradable materials: Degradation mechanisms, mechanical properties, and biocompatibility for orthopedic applications.

Mg-based and Zn-based biodegradable materials have the potential to become the next-generation implant materials to treat bone diseases, because of their desired degradation and mechanical properties. This article reviews the status of these implant materials. The required properties of biodegradable materials such as biodegradability, mechanical properties, and biocompatibility for performance evaluation were briefly discussed. The influence of fabrication techniques, microstructure, alloying elements, and post-processing techniques on the properties of Mg and Zn-based materials was addressed. The degradation mechanism by dissolution, oxidation, and interaction with human body cells was discussed. The biocompatibility of Mg and Zn-based biodegradable materials was analyzed. The significance of in vitro and in vivo biocompatibility testing was highlighted, emphasizing the superiority of in vivo results over cell line studies. This article identifies the many Mg and Zn-based biodegradable materials and summarizes the key findings.

A comprehensive investigation of the use of freeze concentration appro aches for the concentration of fish protein hydrolysates.

Fish protein hydrolysates (FPH) are inherently unstable in their liquid form, necessitating either freezing or dewatering for stabilization. Gentle methods such as freeze concentration can be used to remove water, this can be achieved by freezing water in solution by decreasing the bulk temperature below freezing point and separating pure ice crystals from concentrated solution. This approach serves as an alternative to techniques like evaporation and reverse osmosis for concentrating solutions that have high water content, significant nutritional value, and thermolabile compounds. This is crucial as many bioactive compounds degrade when exposed to elevated temperatures. Another notable advantage of this technology is its potential to reduce energy consumption by up to 40% when integrated into the FPH drying process. Although this technology is currently industrialized primarily for juices, it can achieve concentrations of up to 60°Brix and manage viscosities up to 400 mPa.s. Numerous studies have been dedicated to enhancing design and processes, leading to a 35% reduction in the system's capital cost and a 20% reduction in energy consumption. Moreover, freeze concentration can synergize with other concentration techniques, creating more efficient hybrid processes. This review aims to introduce freeze concentration as a superior option for preserving fish protein hydrolysates, enhancing their stability, and maintaining their nutritional and bioactive qualities.

Managing energy transition alongside environmental protection by making use of AI-led butanol powered SI engine optimization in compliance with SDGs.

Enormous consumption of fossil fuel resources has risked energy accessibility in the upcoming years. The price fluctuation and depletion rate of fossil fuels instigate the urgent need for searching their reliable substitute. The current study tries to address these issues by presenting butanol as a replacement for gasoline in SI engines at various speeds and loading conditions. The emission and performance parameters were ascertained for eight distinct butanol-gasoline fuel blends. The oxygenated butanol substantially increases engine efficiency and boosts power with lower fuel consumption. The carbon emissions were also observed to be lower in comparison with gasoline. Furthermore, the Artificial Intelligence (AI) approach was used in predicting engine performance running on the butanol blends. The correlation coefficients for the data training, validation, and testing were found to be 0.99986, 0.99942, and 0.99872, respectively. It was confirmed that the ANN predicted results were in accordance with the established statistical criteria. ANN was paired with Response Surface Methodology (RSM) technique to comprehend the influence of the sole design parameters along with their statistical interactions controlling the responses. Similarly, the R2 value of responses in case of RSM were close to unity and mean relative errors (MRE) were confined under specified range. A comparative study between ANN and RSM models unveiled that the ANN model should be preferred. Therefore, a joint utilization of the RSM and ANN can be more effective for reliable statistical interactions and predictions.

Innovative technologies for removal of micro plastic: A review of recent advances.

Plastics are becoming a pervasive pollutant in every environmental matrix, particularly in the aquatic environment. Due to increased plastic usage and its impact on human and aquatic life, microplastic (MP) pollution has been studied extensively as a global issue. The production of MP has been linked to both consumer and commercial practices. There is a significant amount of MP's that must be removed by wastewater treatment plants before they can be bioaccumulated. Many researchers have recently become interested in the possibility of eliminating MPs in wastewater treatment plants (WWTP). Many studies have analyzed MP's environmental effects, including its emission sources, distribution, and impact on the surrounding environment. The effectiveness of their removal by various wastewater treatment technologies requires a critical review that accounts for all these methods. In this review, we have covered the most useful technologies for the removal of MP during WWTP. The findings of this review should help scientists and policymakers move forward with studies, prototypes, and proposals for significant remediation impact on water quality.

Experiments and CFD simulation of an air-conditioned tractor cabin for thermal comfort of tractor operators in Pakistan.

Tractors are manufactured without air-conditioned cabins in Pakistan. This leads to thermal discomfort for tractor operators working under direct solar exposure. Therefore, this study aimed to design and install an air-conditioned cabin on a tractor. Experiments were undertaken to evaluate the installed cabin performance under two scenarios i.e., conventional (S-I) and enhanced (S-II) air distribution. Computational fluid dynamics (CFD) simulations were used to analyze airflow and calculate thermal comfort indices. The results showed that the air-conditioned cabin attained optimum thermal conditions under the enhanced air distribution scenario (S-II). In this scenario, the inside cabin temperature was an average of 27.4 °C, compared with 30.4 °C in S-I. The relative humidity remained similar in both scenarios, around 53 %. The temperature difference between the cabin and the ambient environment was 11.09 °C in S-II, aligning with the thermal comfort conditions outlined in ISO 14269-2. Furthermore, the CFD simulations showed a predicted mean vote (PMV) index of 0.61 and the percentage people dissatisfied (PPD) index of 26.5 %. These results also confirm the provision of optimum thermal conditions for operator inside the cabin. The simulations also demonstrated good agreement with experimental data, with a small difference in air temperature (2 °C) and relative humidity (5.8 %). In the light of these findings, this study recommends installation of air-conditioned cabin on tractors with enhanced air distribution (S-II) in Pakistan to improve thermal comfort of operators.

A Hybrid Data-Driven Metaheuristic Framework to Optimize Strain of Lattice Structures Proceeded by Additive Manufacturing.

This research is centered on optimizing the mechanical properties of additively manufactured (AM) lattice structures via strain optimization by controlling different design and process parameters such as stress, unit cell size, total height, width, and relative density. In this regard, numerous topologies, including sea urchin (open cell) structure, honeycomb, and Kelvin structures simple, round, and crossbar (2 × 2), were considered that were fabricated using different materials such as plastics (PLA, PA12), metal (316L stainless steel), and polymer (thiol-ene) via numerous AM technologies, including stereolithography (SLA), multijet fusion (MJF), fused deposition modeling (FDM), direct metal laser sintering (DMLS), and selective laser melting (SLM). The developed deep-learning-driven genetic metaheuristic algorithm was able to achieve a particular strain value for a considered topology of the lattice structure by controlling the considered input parameters. For instance, in order to achieve a strain value of 2.8 × 10-6 mm/mm for the sea urchin structure, the developed model suggests the optimal stress (11.9 MPa), unit cell size (11.4 mm), total height (42.5 mm), breadth (8.7 mm), width (17.29 mm), and relative density (6.67%). Similarly, these parameters were controlled to optimize the strain for other investigated lattice structures. This framework can be helpful in designing various AM lattice structures of desired mechanical qualities.

Atypical haemorrhagic colloid cyst: 2 case reports surgical management and review of literature.

INTRODUCTION: Colloid cysts are benign cystic lesions located at the anterior part of the third ventricle mostly at the foramen of Monro and contain colloid material. Hemorrhage in a colloid cyst is exceedingly rare. Only 15 clinically diagnosed cases of haemorrhagic cysts were reported in the literature and 5 more cases on autopsy. Here we report two rare cases of a haemorrhagic colloid cyst describing the atypical radiological findings, the undertaken surgical procedures and histopathological results. PRESENTATION OF CASES: We presented 2 cases of haemorrhagic third ventricle colloid cysts. First case is a 27-year-old male patient, presented with dizziness, nausea, vomiting and blurring of vision. He was operated by transcortical endoscopic transventricular excision of a third ventricular cyst and the insertion of external ventricular drain. The second patient is a 21-year-old male, presented with history of worsening headache for 1 month associated with blurring of vision. The patient had a transcortical microscopic, transventricular cyst excision. DISCUSSION: Many questions regarding the best way to diagnose and manage such lesions remain unanswered. Hence, we summarize the relevant diagnostic images and best surgical techniques. CONCLUSION: We concluded that, though exceedingly rare, colloid cyst can bleed and cause rapid deterioration in neurological status, thus, presence of atypical features should alert the physicians to consider atypical colloid cyst that would be valuable in surgical decision making whether endoscopic or microscopic.

Prioritization of Medicine Importation by the Private Sector in Sudan: Evidence from a Data Analysis, 2012-2015.

OBJECTIVES: The objective of this study is to analyze the annual medicines imported by private sector for the period between 2012 and 2015 with the help of priority system based on ABC-VEN matrix analysis and therapeutic category analysis. METHODS: A retrospective cross-sectional study was conducted. The Always, Better, and Control (ABC) analysis based on drug expenditure and Vital, Essential, and Nonessential (VEN) analysis based on the criticality of the drugs was performed for annual importation in 2015. RESULTS: Using ABC analysis, we found that 47 items (9.2%) accounted for 70% of the budget (class A), whereas a larger numbers of items (344; 67.2%) accounted for only 10% of the importation costs (class C). A moderate number of items (120; 23.5%) comprised 20% of the annual medicine importation value (class B). VEN analysis revealed that 89 items (17.4%) in the vital category constituted 41.6% of the importation value, whereas 349 (68.3%) grouped as essential constituted 45.1% of the value, and 73 (14.2%) of the items considered as nonessential medicines consumed only 13.3% of the total medicines imported in 2015. From the resultant ABC-VEN coupled matrix, three categories were created I, II and III. CONCLUSION: In view of limited resources, it is important that the existing resources should be utilized appropriately. This study identified a range of suggestions for better medication importation. The ABC and VEN analyses along with the therapeutic category analysis technique are convenient, systematic, and replicable methods and should be adopted for optimization and prioritization of resources.

Identification of the medial femoral safe zone for drilling during dynamic hip screw side plate fixation: A CT angiogram tracing of the profunda femoris artery.

OBJECTIVES: Iatrogenic injury of the Profunda Femoris Artery (PFA) at time of hip fixation surgery can increase morbidity and mortality and prolong the hospital stay. This is an injury that tends to pass unnoticed as a cause of postoperative deterioration despite being frequently reported in the literature. Our study aims to describe the anatomy of the PFA in relation to the medial femoral cortex with specific emphasis on its orientation relative to the position of a sliding hip screw side plate construct. By doing so we are able to present clear guidance to orthopaedic surgeons on how to avoid iatrogenic PFA injury at the time of hip fracture fixation. METHODS: Using Computed Tomography Angiographic (CTA) studies, the course of the PFA in relation to the medial femoral cortex was traced in 44 patients (28 males and 16 females) with mean age of 65.6 years. Coronal and axial CT sections were cross-linked to specify the position of the PFA at 1 cm intervals. RESULTS: The course of the artery could be divided into three parts relative to a fixed reference point. Proximal and distal parts of the artery were in a safer position in comparison to the middle part of the artery that was found very close to the femoral cortex and along the coronal axis of the femur (mean angle 2.9° from the femoral coronal axis and 13.8 mm from the medial femoral cortex). Using the commercially available side plate constructs, this part of the artery corresponded to the distal part of the plate (third and fourth holes). CONCLUSION: Special attention needs to be practiced by the operating surgeon while drilling into the third and fourth holes of the side plate.

The use of a validated pre-discharge questionnaire to improve the quality of patient experience of orthopaedic care.

Patient experience is central to the delivery of excellent healthcare. As such it is enshrined within the 2015 NHS outcomes framework, a set of indicators against which quality in healthcare is measured. A variety of tools are available to quantify patient experience across clinical settings. When combined with a framework for continued data collection and suitable mechanisms for analysis, feedback, and intervention, these tools allow improvements in patient care and clinical services to be realised. In response to an increasing number of patient complaints and friends and family scores below the trust average within our orthopaedic department we instituted an improvement programme in March 2015. The programme was based around the Picker Patient Experience 15 questionnaire and aimed to improve friends and family test scores, reduce complaints and improve patient experience scores over an 18-month period. An improvement model including baseline measurement and 2 improvement cycles over an 18-month period was used. Initial benchmarks for practice were created by referencing national data allowing problem areas of care to be identified and interventions to address these developed. This process identified areas for improvement including improving staff awareness and engagement with patient experience, improving staff and patient communication and ensuring patients were aware and involved in plans for their own care. Actions to address these issues resulted in a 38% decrease in patient complaints, a >10% increase in patient experience, and improvements in patient satisfaction and friends and family scores.

Factors Influencing patient experience and satisfaction following surgical management of ankle fractures.

BACKGROUND: Patient feedback is increasingly important to inform and develop effective healthcare within the United Kingdom. In order to optimise patient experience of ankle fracture care in our unit, we sought to identify elements of practice associated with poor patient experience and low levels of satisfaction. METHODS: Adult patients with closed ankle fractures requiring fixation over a ten month period were prospectively identified. Prior to discharge all patients completed the Picker Patient Experience Questionnaire (PPE-15), satisfaction visual analogue scale (VAS: 0-10) and a demographic questionnaire. Operative delay and cancellation episodes were similarly noted. PPE-15 and satisfaction VAS data were collected concurrently from a control group of elective hip and knee arthroplasty patients. RESULTS: 52 patients (23 males) of average age 47 years (17-86) underwent ankle fracture fixation. Median pre-operative length of stay (LOS) was 3days (IQR 1-6). Ankle fracture patients had significantly worse experiences compared to arthroplasty patients (p<0.05 across all 15 PPE domains). Once pre-operative length of stay exceeded 3days patients reported more areas of concerns (6 of 15) than those waiting 3days or less (4 of 15) (p=0.02). Cancelled patients reported significantly worse experiences, with satisfaction VAS of 7 (versus 9 in those not cancelled [p=0.005]), and median of 6 PPE-15 domains of concern (versus 3.5 [p=0.03]). CONCLUSIONS: Efforts to improve the healthcare experience of patients with ankle fractures should be focused on improving processes that minimise cancellation of surgery and the communication around delay management.

Immunophenotyping of Non-Hodgkin's lymphomas in Sudan.

INTRODUCTION: Non-Hodgkin's lymphomas (NHLs) are heterogeneous group of malignant lymphoproliferative disorders. STUDY OBJECTIVES: This was a retrospective study aimed to classify NHLs into B cell and T cell types; in addition to demonstrate the histological patterns and correlate it with gender, age and site of the biopsy. METHODS: The study was conducted in Histopathology Department, National Heath Laboratory, during the period 2007-2010. Formalin fixed paraffin wax embedded tissue blocks which were diagnosed as NHLs by routine Haematoxylin and Eosin (H&E) stain during the period 2000-2008 were used. Haematoxylin and Eosin (H&E) stain were done. Immunohistochemistry stains performed according to Dako cytomation protocol 2007. Lymphoid markers which were used in this study are CD45 (LCA), CD20 (B cell marker), CD3 (T cell marker), CD15 and CD 30. Epithelial marker which was used is CK MNF116. The total number of samples collected was 66; two of them were excluded because of poor processing. Another two specimens were excluded because they are non-reactive with lymphoid markers. The remaining 62 specimens were confirmed to be NHLs and classified into B cell and T cell types. RESULTS: The study showed that B cell NHLs represented 87.1% while T cell NHLs were 12.9%. The Male: Female ratio was 1.6:1. The major affected age group was (47-67) years (38.1% of all specimens). The most frequent histological grade was intermediate grade NHLs (27% of all specimens). The most common site of NHLs in this study is the lymph node (40% of all specimens) followed by stomach (19.4%). CONCLUSION: Extranodal locations are the most common sites affected with T cell NHLs. In conclusion; this study confirmed the fundamental role of immunohistochemistry in diagnosis and classification of NHLs.